15.5.2. Conservation of Linear Momentum

Try these first

1. 1.

   Define conservation of linear momentum.

   Hint

   Think about momentum changes under external influences.

2. 2.

   What is a fixed control volume?

   Hint

   Consider a tank filled with water at rest.

3. 3.

   What does conservation of linear momentum state?

   • It stays constant without external forces.
   • It only applies to solids.
   • It varies depending on the medium.

   Hint

   Think of a closed box of marbles.

4. 4.

   Is the Reynolds transport theorem used for mass, momentum, or both?

   • True
   • False

   Hint

   Consider how properties apply across control volumes.

5. 5.

   Design a fluid transport system that ensures steady mass flow. Identify potential challenges and apply the conservation principles discussed.

   Hint

   Analyze each section of your system to maintain balance.

6. 6.

   Using the Reynolds transport theorem, calculate the net momentum change in a control volume experiencing varying flows.

   Hint

   Break it down into manageable parts—evaluate influx and outflux separately before combining.